Conduit Fill Calculator
Calculate the number of cables that can fit in a raceway based on cable diameter, fill factor, and raceway type.
Input Parameters
Enter the outer diameter of the cable in inches
NEC recommends < 40% fill for conduit
%
Results
Enter all parameters to see results
Fill Factor Guidelines
Conduit (< 40%): Per NEC requirements for multiple cables in conduit
Cable Tray (< 50%): Allows for airflow and cable management
Surface Raceway (< 50%): For Wiremold and similar surface-mount